CVE-2023-34326
HIGHDescription
The caching invalidation guidelines from the AMD-Vi specification (48882—Rev 3.07-PUB—Oct 2022) is incorrect on some hardware, as devices will malfunction (see stale DMA mappings) if some fields of the DTE are updated but the IOMMU TLB is not flushed. Such stale DMA mappings can point to memory ranges not owned by the guest, thus allowing access to unindented memory regions.
How to fix
TridentStack Control can deploy fixes like this automatically across your Windows, macOS, and Linux fleet. See how it works
Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.
CVSS v3 Vector
Exploitability
Impact
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Exploit Intelligence
Low risk: more likely to be exploited than 21% of all known CVEs.
References
Related Vulnerabilities
Other CWE-672 vulnerabilities, ordered by exploit likelihood. View all
| CVE | Severity | CVSS | EPSS | Exploited | Fix |
|---|---|---|---|---|---|
| CVE-2024-23638 | Medium | 6.5 | 60% | - | Fix |
| CVE-2020-11027 | Medium | 6.1 | 14% | - | Fix |
| CVE-2019-17638 | Critical | 9.4 | 11% | - | Fix |
| CVE-2009-3547 | High | 7.0 | 4.9% | - | - |
| CVE-2019-15691 | High | 7.2 | 4.7% | - | Fix |
| CVE-2020-24030 | Critical | 9.8 | 2.7% | - | - |
Common questions
How do I fix CVE-2023-34326?
Upgrade xen on debian 12 to 4.17.2+76-ge1f9cb16e2-1~deb12u1 or later.
Is CVE-2023-34326 being actively exploited?
Not that we know of. CVE-2023-34326 is not in the CISA Known Exploited Vulnerabilities catalog. Its EPSS score of 0.29% is the estimated probability that it will be exploited in the next 30 days. That is higher than 21% of all scored CVEs.
How severe is CVE-2023-34326?
CVE-2023-34326 has a CVSS v3 base score of 7.8, rated high. CVSS rates the technical impact if the vulnerability is exploited, not how likely that is, so weigh it alongside the exploit-prediction score when you decide what to patch first.
What does CVE-2023-34326 affect?
Published advisories record a fix for xen (Debian). Only products with a sourced advisory are listed, so treat this as what we can cite rather than a complete inventory.
Embed a live status badge for CVE-2023-34326
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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2025-11-04.